@misc{indiciaeadd413e3f595,
  title = {Petrographic and scanning electron microscope studies of samples from the Roberts Mountains and Popovich formations, Carlin Mine area, Eureka County, Nevada},
  author = {Augustus K. Armstrong and W.C. Bagby and Charles Ekburg and John Repetski},
  year = {1987},
  doi = {10.3133/b1684},
  url = {https://pubs.usgs.gov/publication/b1684},
  note = {Source identifier: b1684}
}